Oh, added the Script Menu option to my website. Next thing to think about is movies. I am not sure that I can auto render movies in the same way that I can do single frames using Python. What I think I can do is copy keyframe settings (focus depth, etc) from the Dolly camera to the left/right cameras. That will at least make it easy to render a left and right movie. Question - what do you use to make anaglyph movies once you do have the left & right movies?